#include <QMouseEvent>
#include <QTimer>
+#ifdef Q_OS_MAC
+/* Qt on macOS does not respect the Qt::WA_OpaquePaintEvent attribute
+ * and resets the widget backing store at each update. Therefore, we
+ * use our own backing store in this case */
+#define LYX_BACKINGSTORE 1
+#include <QPainter>
+#endif
+
namespace lyx {
class Buffer;
///
void dispatch(FuncRequest const & cmd0);
- /// hide the visible caret, if it is visible
- void hideCaret();
+ /// recompute the shape and position of the caret
+ void updateCaretGeometry();
/// show the caret if it is not visible
void showCaret();
+ /// hide the caret if it is visible
+ void hideCaret();
/// Set the range and value of the scrollbar and connect to its valueChanged
/// signal.
void updateScrollbar();
void paintPreeditText(GuiPainter & pain);
+ void resetScreen() {
+#ifdef LYX_BACKINGSTORE
+ int const pr = p->pixelRatio();
+ screen_ = QImage(static_cast<int>(pr * p->viewport()->width()),
+ static_cast<int>(pr * p->viewport()->height()),
+ QImage::Format_ARGB32_Premultiplied);
+# if QT_VERSION >= 0x050000
+ screen_.setDevicePixelRatio(pr);
+# endif
+#endif
+ }
+
+ QPaintDevice * screenDevice() {
+#ifdef LYX_BACKINGSTORE
+ return &screen_;
+#else
+ return p->viewport();
+#endif
+ }
+
+#ifdef LYX_BACKINGSTORE
+ void updateScreen(QRectF const & rc) {
+ QPainter qpain(p->viewport());
+ double const pr = p->pixelRatio();
+ QRectF const rcs = QRectF(rc.x() * pr, rc.y() * pr,
+ rc.width() * pr, rc.height() * pr);
+ qpain.drawImage(rc, screen_, rcs);
+ }
+#else
+ void updateScreen(QRectF const & ) {}
+#endif
+
///
GuiWorkArea * p;
///
///
GuiView * lyx_view_;
+#ifdef LYX_BACKINGSTORE
+ ///
+ QImage screen_;
+#endif
///
CaretWidget * caret_;
/// is the caret currently displayed